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Definition
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Term
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Definition
| the rate of change in the velocity of an object with time |
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Definition
| a substance with a pH less than 7 that dissolves in water, producing hydronium ions |
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Definition
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Definition
| the alternative forms of a gene |
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Definition
| reproduction that only involves one parent, producing genetically identical offspring |
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Definition
| a small rocky body that orbits the sun |
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Definition
| the protective layers of gases that surround and rotate with the Earth |
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Definition
| the smallest particle of matter |
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Definition
| the number of protons in the nucleus of an atom |
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Definition
| a substance with a pH greater than 7 that dissolves in water, producing hydroxide ions |
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Definition
| the great variety and number of species on Earth |
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| the processes that move important materials through the environment |
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Definition
| the weight of living matter in a given ecosystem |
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| a large region characterized by climate and groups of plants and animals found in it (ex. tropical rain forest, grassland, desert) |
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Definition
| the thin area of Earth where all life exists |
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| anything living in an ecosystem |
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Definition
| an organism that eats meat |
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Definition
| the number of individuals in a species that can be supported by its environment |
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Definition
| the basic structural unit of life |
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Definition
| the process where one cell divides to produce two daughter cells; mitosis |
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Definition
| the outer layer of a cell that controls the movement of molecules into and out of a cell |
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Definition
| chemical process that takes place inside mitochondria to break down nutrients into energy |
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Definition
| the structure around the membrane of plant cells that provides support and strength |
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Definition
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Definition
| a change in substance that results in a different substance with different properties |
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Definition
| characteristics of a substance that distinguish it from other substances |
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Definition
| a process of chemical change that involves the molecular or ionic structure of a substance to be rearranged |
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Definition
| process where organic compounds are synthesized through energy derived from chemical reactions |
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Definition
| a green pigment in plants that absorbs light energy for photosynthesis |
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Definition
| threadlike structure of DNA and protein found inside a cell's nucleus |
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Definition
| the complete path of an electric current |
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Definition
| the average condition of the weather at a place over a period of years (temperature, wind velocity, and precipitation) |
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Definition
| all the different interacting populations within a defined habitat |
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Definition
| process by which heat or electricity is transferred by direct molecular contact |
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| preservation and protection of a natural resource |
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| an organism that needs to eat another organism for energy |
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Definition
| the sample in an experiment that is used as a standard of comparison for checking the results (does not contain the variable) |
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Definition
| the transfer of heat by the flowing action within a fluid or gas |
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Definition
| chemical bond formed through the sharing of electrons between two or more atoms |
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Definition
| the outer layer of rock that covers the Earth, other planets, the moon, or asteroids |
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Definition
| continuous flow of air, water, or electricity |
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Definition
| an interval of time where a sequence of a recurring succession of events is completed |
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Definition
| the fluid within a cell where most life processes occur |
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Definition
| special organisms such as bacteria and fungi that feed on and break down dead animals' remains, returning their nutrients to the environment density the quantity that compares the mass of an object to its volume (density = mass/volume) |
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Term
| deoxyribonucleic acid (DNA) |
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Definition
| a self-replicating material in living organisms that contains the genetic code, transmitting the hereditary pattern |
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Definition
| the variable measured in an experiment that depends on the value of the independent variable |
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Definition
| the process where materials flow through the cell membrane |
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Definition
| the two twisted strands that form the spiral structure of a DNA molecule |
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Definition
| occurs when rocks suddenly move along a fault in the Earth's crust |
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Definition
| the obscuring of one celestial body by another |
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Definition
| the study of organisms in an area that interact with the nonliving elements of the environment |
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Definition
| a community of organisms in an area that interact with the nonliving elements of the environment |
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Definition
| the form of energy produced by the flow of electrons from one point to another through a conductor (electricity) |
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Definition
| the entire range of electromagnetic waves, showing all frequencies and wavelengths, including visible light |
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Definition
| an atomic particle with negative electrical charge and is the primary carrier of electricity in solids |
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Definition
| one of the basic substances that constitutes all matter |
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Definition
| reactions formed with the absorption of heat |
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Definition
| the ability to do work; nuclear, sound, thermal, and light |
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Definition
| the surroundings in which both living and nonliving things live |
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Definition
| process where rock materials at the Earth's surface are worn and carried away |
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Definition
| changes in the genetic composition of a population through successive generations |
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Definition
| reactions that release heat energy |
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Definition
| the sample in an experiment that contains the variable |
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Definition
| a species that no longer exists |
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Definition
| a crack in the Earth's crust |
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Definition
| the joining of an egg and sperm during sexual reproduction to produce a new individual |
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Definition
| an object at rest will remain at rest, and an object in motion will remain in motion at the same speed and in the same direction until an outside force acts on the object |
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Definition
| the splitting of an atomic nucleus into two lighter weight nuclei, resulting in the release of large amounts of energy |
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Definition
| long hair-like extensions from a cell's surface used for locomotion |
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Definition
| an arrangement of organisms in an ecosystem according to the order in which nutrients are passed along |
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Definition
| interconnected food chains in an ecosystem |
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Definition
| a push or pull acted upon an object |
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| remains or traces of an ancient organism preserved in the Earth's crust |
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Definition
| a force that resists motion |
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Definition
| the combination of two lighter weight nuclei to form heavier nuclei, resulting in the release of large amounts of energy |
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Definition
| large clusters of stars found throughout the universe (ex. The Milky Way) |
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| a change in gene frequencies |
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Definition
| a large mass of ice that slowly flows over the land |
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Definition
| a rise in worldwide temperatures as a result of the greenhouse effect |
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Definition
| the force that pulls objects down to the Earth's surface, causing weight |
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Definition
| the trapping of heat in Earth's atmosphere by carbon dioxide |
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Definition
| the specific place where an organism lives |
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| animals that get their energy directly from plants |
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Definition
| the maintenance of a stable internal environment regardless of changes in the external environment |
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Definition
| the amount of moisture in the atmosphere |
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Definition
| the liquid part of Earth (bodies of water and water vapor) |
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Definition
| a possible solution to a scientific problem derived from observation and inference from scientific data |
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Definition
| the type of rock formed from volcanic activity |
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Definition
| the variable that you control in an experiment |
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Definition
| the resistance an object has to a change in its state of motion |
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Definition
| the prediction made based on observation |
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| formed when electron transfer occurs between atoms |
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Definition
| atoms of the same chemical element, only differing in mass |
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Definition
| work done where 1 Newton (N) acts through a distance of 1 meter |
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Definition
| energy of an object in motion |
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Definition
| the changes an organism undergoes as it develops and produces offspring |
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Definition
| a visible form of radiant energy that moves in waves |
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Definition
| molten rock material within the Earth |
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| the thick layer of rock below Earth's crust |
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Definition
| the amount of matter in an object |
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Definition
| anything that occupies space and has mass |
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Definition
| energy where moving objects perform work |
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Definition
| cell division that produces gametes |
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| all chemical reactions that take place in the body |
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Definition
| rock formed during crustal uplift (under great pressure, heat, and water) |
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Definition
| process where genetic material is equally divided (prior to cell division) |
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Definition
| matter formed when two or more components are put together while retaining their own properties |
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Definition
| the smallest particle of a substance |
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Definition
| a change in the position of an object in relation to another object |
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Definition
| a change in the genetic material of an organism |
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Definition
| the process where organisms that are best adapted to their environment are able to survive and produce offspring |
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Definition
| the basic unit for the force of gravity |
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Definition
| properties of an atomic nucleus |
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Definition
| the energy stored within the nucleus of an atom |
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Definition
| the center of an atom that contains the genetic material and controls cell activities |
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Definition
| the chemicals an organism uses to produce energy |
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| anything perceived through use of our senses |
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Definition
| an organism that feeds on both plants and animals |
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Definition
| the path an object follows around another object (i.e. Earth around the sun, electron around atomic nucleus) |
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Definition
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Definition
| the movement of water through a semi-permeable membrane |
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| an organism living in, with, or on another host organism; the parasite benefits, but the host is generally harmed |
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Definition
| the chemical process where chlorophyll-containing plants use the energy from sunlight to convert carbon dioxide and water into carbohydrates, releasing oxygen as a byproduct |
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Definition
| a change in a substance that does not alter its chemical makeup |
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Definition
| a large body in the solar system that revolves around the sun |
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Definition
| the contamination of land, air, and water by harmful substances, usually from humans |
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Definition
| all the plants or animals of the same kind that live within a habitat |
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Definition
| the stored energy in matter due to its position or its chemical composition |
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Definition
| an animal that hunts and kills for food |
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| an animal that is taken by a predator as food |
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| any organisms that make their own food by photosynthesis (i.e. green plants and algae) |
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Definition
| a nutrient made up of long chains of amino acids used to build cell structures and carry out cell functions |
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Definition
| a stable subatomic particle occurring in all atomic nuclei with a positive electric charge equal in magnitude to the negative charge of an electron |
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Definition
| the process of transferring energy (heat) in the form of waves |
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Definition
| a substance that enters into and is altered in the course of a chemical reaction |
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Definition
| to process something in order to regain material for human use |
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Definition
| the throwing back by a body or surface of light, heat, or sound without absorbing it |
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Definition
| the bending of any wave, such as a light or sound wave, when it passes from one medium into another of different velocity |
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Definition
| the duplication of something (i.e. experiments, procedures, samples, DNA during mitosis) |
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Definition
| the process by which organisms produce offspring |
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Definition
| the gathering of facts, data, and opinions on a scientific topic |
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Definition
| the physical and chemical processes by which an organism supplies its cells and tissues with oxygen, relieving them of carbon dioxide |
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Definition
| the turning of a body part about its long axis as if on a pivot |
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